US3660031A - Method for preparing boron suboxide - Google Patents
Method for preparing boron suboxide Download PDFInfo
- Publication number
- US3660031A US3660031A US122506A US3660031DA US3660031A US 3660031 A US3660031 A US 3660031A US 122506 A US122506 A US 122506A US 3660031D A US3660031D A US 3660031DA US 3660031 A US3660031 A US 3660031A
- Authority
- US
- United States
- Prior art keywords
- boron
- suboxide
- reaction
- boron suboxide
- zinc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229910000419 boron suboxide Inorganic materials 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 22
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 30
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011787 zinc oxide Substances 0.000 claims abstract description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 14
- 229910052725 zinc Inorganic materials 0.000 claims description 14
- 239000011701 zinc Substances 0.000 claims description 14
- 229910052810 boron oxide Inorganic materials 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 5
- 229910052796 boron Inorganic materials 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 description 19
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 238000006722 reduction reaction Methods 0.000 description 8
- 229910052786 argon Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000006104 solid solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- PZKRHHZKOQZHIO-UHFFFAOYSA-N [B].[B].[Mg] Chemical compound [B].[B].[Mg] PZKRHHZKOQZHIO-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/06—Boron halogen compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
- C01B35/10—Compounds containing boron and oxygen
Definitions
- ABSTRACT Boron suboxide (B 0) is prepared by the reduction of Zinc 52 vs. C]. ...23/204 R, 23/149, 75/86 ggejjfig in atmosphere a temperature 51 im. c1. ..C0lb35/00 [58] Field of Search ..23/149, 204; 75/86 3 Claims, No Drawings METHOD FOR PREPARING BORON SUBOXIDE
- the present invention relates to the preparation of boron suboxide (B by reducing zinc oxide with boron. This invention was made in the course of, or under, a contract with the U. S. Atomic Energy Commission.
- Boron suboxide (B 0) is a highly refractory material characterized by its extreme hardness (average Vickers hardness of 3,820 kg/mm at a l00-g load), resistance to oxidation and acids, low density of approximately 2.80 gLcc, and a decomposition temperature above about 1,750 C. These properties make this material suitable for use on surfaces subject to abrasion, e.g., grinding wheels, drill bits, machine tools, etc., and in structures employed in high temperature applications.
- This goal is achieved by reducing zinc oxide with boron at a temperature adequate to effect the reduction reaction.
- the reaction forms boron suboxide B 0 and a reaction by-product of metallic zinc which is volatile at the reaction temperature.
- the method of the present invention is directed to the preparation of boron suboxide (B 0) having a theoretical composition of 82.25 weight percent (wt boron and 17.75 wt of oxygen.
- the method is practiced by blending zinc oxide powder and boron powder, loading the blended powders into a ceramic or refractory metal reaction vessel and then confining the loaded vessel in a suitable furnace within which a flowing stream of an inert gas such as argon, helium, and the like, or vacuum may be used to form the furnace atmosphere.
- the powders are heated in the presence of an inert atmosphere to a temperature in the range of l,200-l,500 C. to effect a reduction of the zinc oxide by the boron in accordance with the following reaction:
- the quantities of boron and zinc oxide powders employed in the reaction are preferably such as to provide a stoichiometric ratio, but an excess of boron may be used without suffering deleterious results.
- the size of powder found satisfactory for the reaction is 0.03 to 0.05 micron for the boron and 0.25 to 1.05 microns for the zinc oxide.
- the boron suboxide powder reduced by the reduction reaction is in a size range of 0.44 to .3 microns.
- the duration of the reaction at the reaction temperature is dependent upon the quantity of powders used and should be sufficiently long to assure volatilization of virtually all if not all of the zinc in the reactants.
- EXAMPLE A mixture was prepared by blending 10.61 grams of commercial zinc oxide powder (reagent grade) having an average particle size of 0.56 micron with 10.0 grams of amorphous boron powder (purity 99+ wt having an average particle size of 0.0363 micron.
- the blended powders were isostatically pressed at 20,000 psi into a pellet having a diameter of about 1 inch and a length of about 2 inches.
- the pressed pellet was placed in an aluminum oxide (A1 0 boat and inserted into a silicon carbide resistance furnace equipped with a mullite tube.
- An inert atmosphere of argon was provided inside the furnace by flowing the argon through the mullite tube at a moderate flow rate. The temperature of the furnace was increased to 1,500 C.
- the present invention provides an improved method of preparing boron suboxide which readily lends itself to large scale production.
- the metallic zinc liberated during the reaction does not react with the material forming the reaction vessel and can be readily reclaimed. With the removal of the zinc during the reaction it is possible to prepare B 0 powder of high purity by using starting materials within minimal amounts of impurities.
- a method of preparing boron suboxide having the formula B 0, comprising the steps of admixing particulate boron of a size in the range of 0.03 to 0.05 micron and particulate Zinc oxide of a size in the range of 0.25 to 1.05 microns, confining the admixture in a volume, subjecting the volume to an inert atmosphere, and heating the admixture to a temperature in the range of 1,200l,500 C. to effect a reaction between the boron and zinc oxide for reducing the zinc oxide to gaseous metallic zinc and forming the boron suboxide.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Boron suboxide (B7O) is prepared by the reduction of zinc oxide with boron in an inert atmosphere at a temperature of 1,200*1,500* C.
Description
I Umted States Patent 1 3,660,03 1 Holcombe, Jr. et al. 1 May 2, 1972 [54] METHOD FOR PREPARING BORON SUBOXIDE [56] References Cited [72] Inventors: Cressie E. Holcombe, Jr.; Ottis J. Home, THER PUBLICATIONS both of Oak Rldge Tenn Searcy et al., Journal of Physical Chemistry, Vol. 61 July, [73] Assignee: The United States of America as 9571 PP- represented by the United States Atomic Energy Commission Primary Exammer--Herbert T. Carter AttorneyRoland A. Anderson [22] Filed: Mar. 9, 1971 21 App]. No.: 122,506 [57] ABSTRACT Boron suboxide (B 0) is prepared by the reduction of Zinc 52 vs. C]. ...23/204 R, 23/149, 75/86 ggejjfig in atmosphere a temperature 51 im. c1. ..C0lb35/00 [58] Field of Search ..23/149, 204; 75/86 3 Claims, No Drawings METHOD FOR PREPARING BORON SUBOXIDE The present invention relates to the preparation of boron suboxide (B by reducing zinc oxide with boron. This invention was made in the course of, or under, a contract with the U. S. Atomic Energy Commission.
Boron suboxide (B 0) is a highly refractory material characterized by its extreme hardness (average Vickers hardness of 3,820 kg/mm at a l00-g load), resistance to oxidation and acids, low density of approximately 2.80 gLcc, and a decomposition temperature above about 1,750 C. These properties make this material suitable for use on surfaces subject to abrasion, e.g., grinding wheels, drill bits, machine tools, etc., and in structures employed in high temperature applications.
Several techniques have been previously employed for producing boron suboxide and include such procedures as reducing boron oxide (B 0 with boron, magnesium, or silicon, or by reducing magnesium oxide with boron. With each of these known procedures there are attendant shortcomings or drawbacks which detract from the usefulness of the procedure in the production of B 0. For example, one of the more successful procedures involves the reduction of molten B 0 with boron, but the high volatilization and vapor pressure of this oxide at the reaction temperatures of 1,200-1,500 C. respectively increase the likelihood of producing nonstoichiometric B 0 and inhibit the sealing of the reaction vessel. Also, the molten B 0 reacts with the metal or ceramic reaction vessel and thereby contaminates the B-,O. With respect to other known procedures, the reduction of B 0 with magnesium produces a solid solution of magnesium and magnesium boride contaminants in the suboxide while the reduction of magnesium oxide with boron produces only a relatively small yield of B 0 and is very inefficient.
It is the primary aim or objective of the present invention to provide a method of preparing B 0 that does not suffer the above and other shortcomings or drawbacks associated with the previously known techniques of producing B 0. This goal is achieved by reducing zinc oxide with boron at a temperature adequate to effect the reduction reaction. The reaction forms boron suboxide B 0 and a reaction by-product of metallic zinc which is volatile at the reaction temperature.
Other and further objects of the invention will be obvious upon an understanding of the illustrative method about to be described, or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.
Generally described, the method of the present invention is directed to the preparation of boron suboxide (B 0) having a theoretical composition of 82.25 weight percent (wt boron and 17.75 wt of oxygen. The method is practiced by blending zinc oxide powder and boron powder, loading the blended powders into a ceramic or refractory metal reaction vessel and then confining the loaded vessel in a suitable furnace within which a flowing stream of an inert gas such as argon, helium, and the like, or vacuum may be used to form the furnace atmosphere. The powders are heated in the presence of an inert atmosphere to a temperature in the range of l,200-l,500 C. to effect a reduction of the zinc oxide by the boron in accordance with the following reaction:
ZnO 78 "2" B 0 ZnT During this reaction boron suboxide and metallic zinc are formed with the zinc, the reaction by-product, being volatilized at the reaction temperature to effect its removal from the B 0 and from the furnace by the flowing gas stream or vacuum so as to leave a product of highly pure 8,0. A solid solution of zinc does not occur in the boron suboxide.
The quantities of boron and zinc oxide powders employed in the reaction are preferably such as to provide a stoichiometric ratio, but an excess of boron may be used without suffering deleterious results. The size of powder found satisfactory for the reaction is 0.03 to 0.05 micron for the boron and 0.25 to 1.05 microns for the zinc oxide. The boron suboxide powder reduced by the reduction reaction is in a size range of 0.44 to .3 microns. The duration of the reaction at the reaction temperature is dependent upon the quantity of powders used and should be sufficiently long to assure volatilization of virtually all if not all of the zinc in the reactants.
In order to provide a better understanding of the method of present invention an illustrative example of preparing boron suboxide is set forth below.
EXAMPLE A mixture was prepared by blending 10.61 grams of commercial zinc oxide powder (reagent grade) having an average particle size of 0.56 micron with 10.0 grams of amorphous boron powder (purity 99+ wt having an average particle size of 0.0363 micron. The blended powders were isostatically pressed at 20,000 psi into a pellet having a diameter of about 1 inch and a length of about 2 inches. The pressed pellet was placed in an aluminum oxide (A1 0 boat and inserted into a silicon carbide resistance furnace equipped with a mullite tube. An inert atmosphere of argon was provided inside the furnace by flowing the argon through the mullite tube at a moderate flow rate. The temperature of the furnace was increased to 1,500 C. at a rate of increase of about 300 C. per hour. The reduction of the zinc oxide began at about 1,200 C. The flowing argon carried the gaseous zinc from the reacting pellet to a collection system, consisting of a bubbler filled with mineral oil. The furnace temperature was held at 1,500 C. for about 4 hours to completely react the zinc oxide and boron to form boron suboxide and metallic zinc. The suboxide was cooled and removed from the furnace. Chemical and spectrometric analyses of the product indicated a composition of 82.2 wt boron, 17.27 wt oxygen, and less than 1.0 wt phosphorus. The elemental chemical analysis compares favorably with the aforementioned theoretical composition for B 0. No zinc was detected as an impurity in the boron suboxide product. The analytical data indicates a product purity of 96.74 wt with no refinement of the method.
It will be seen that the present invention provides an improved method of preparing boron suboxide which readily lends itself to large scale production. The metallic zinc liberated during the reaction does not react with the material forming the reaction vessel and can be readily reclaimed. With the removal of the zinc during the reaction it is possible to prepare B 0 powder of high purity by using starting materials within minimal amounts of impurities.
What is claimed is:
l. A method of preparing boron suboxide having the formula B 0, comprising the steps of admixing particulate boron of a size in the range of 0.03 to 0.05 micron and particulate Zinc oxide of a size in the range of 0.25 to 1.05 microns, confining the admixture in a volume, subjecting the volume to an inert atmosphere, and heating the admixture to a temperature in the range of 1,200l,500 C. to effect a reaction between the boron and zinc oxide for reducing the zinc oxide to gaseous metallic zinc and forming the boron suboxide.
2. The method of preparing boron suboxide as claimed in claim 1, wherein the admixture consists essentially of a stoichiometric ratio of boron and zinc oxide.
3. The method of preparing boron suboxide as claimed in claim 1, wherein the step of subjecting the volume to an inert atmosphere is provided by a stream of inert gas movable through said volume, and wherein the gaseous metallic zinc is contacted by the inert gas and removed from said volume.
Claims (2)
- 2. The method of preparing boron suboxide as claimed in claim 1, wherein the admixture consists essentially of a stoichiometric ratio of boron and zinc oxide.
- 3. The method of preparing boron suboxide as claimed in claim 1, wherein the step of subjecting the volume to an inert atmosphere is provided by a stream of inert gas movable through said volume, and wherein the gaseous metallic zinc is contacted by the inert gas and removed from said volume.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12250671A | 1971-03-09 | 1971-03-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3660031A true US3660031A (en) | 1972-05-02 |
Family
ID=22403091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US122506A Expired - Lifetime US3660031A (en) | 1971-03-09 | 1971-03-09 | Method for preparing boron suboxide |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US3660031A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2499967A1 (en) * | 1981-02-16 | 1982-08-20 | Armines | METHOD AND DEVICE FOR MANUFACTURING BY SINKING UNDER LOAD OF RICH ROOM PARTS AND BORE-RICH PIECES |
| US5135892A (en) * | 1991-07-12 | 1992-08-04 | Norton Company | Boron suboxide material and method for its preparation |
| US5330937A (en) * | 1991-07-12 | 1994-07-19 | Norton Company | Boron suboxide material and method for its preparation |
| US5366526A (en) * | 1991-07-12 | 1994-11-22 | Norton Company | Method of abrading with boron suboxide (BxO) and the boron suboxide (BxO) articles and composition used |
| US5456735A (en) * | 1991-07-12 | 1995-10-10 | Norton Company | Method of abrading with boron suboxide (BxO) and the boron suboxide (BxO) articles and composition used |
| WO2008132676A3 (en) * | 2007-04-26 | 2009-06-04 | Element Six Production Pty Ltd | Boron suboxide composite materials |
| EP2248787A1 (en) | 2005-09-07 | 2010-11-10 | Element Six (Production) (Pty) Ltd. | Boron suboxide composite material |
| CN101668716B (en) * | 2007-04-26 | 2013-04-03 | 六号元素（产品）（控股）公司 | Boron suboxide composite material |
| US9908782B2 (en) | 2013-02-14 | 2018-03-06 | The United States Of America As Represented By The Secretary Of The Army | Method for synthesis of boron suboxide |
| US11066331B2 (en) | 2018-04-27 | 2021-07-20 | Saint-Gobain Ceramics & Plastics, Inc. | Material including boron suboxide and method of forming same |
-
1971
- 1971-03-09 US US122506A patent/US3660031A/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| Searcy et al., Journal of Physical Chemistry, Vol. 61, July, 1957, pp. 757 960. * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2499967A1 (en) * | 1981-02-16 | 1982-08-20 | Armines | METHOD AND DEVICE FOR MANUFACTURING BY SINKING UNDER LOAD OF RICH ROOM PARTS AND BORE-RICH PIECES |
| EP0058618A1 (en) * | 1981-02-16 | 1982-08-25 | Association Pour La Recherche Et Le Developpement Des Methodes Et Processus Industriels (Armines) | Method and apparatus for producing articles rich in boron by sintering, and articles obtained therewith |
| US5135892A (en) * | 1991-07-12 | 1992-08-04 | Norton Company | Boron suboxide material and method for its preparation |
| US5330937A (en) * | 1991-07-12 | 1994-07-19 | Norton Company | Boron suboxide material and method for its preparation |
| US5366526A (en) * | 1991-07-12 | 1994-11-22 | Norton Company | Method of abrading with boron suboxide (BxO) and the boron suboxide (BxO) articles and composition used |
| US5456735A (en) * | 1991-07-12 | 1995-10-10 | Norton Company | Method of abrading with boron suboxide (BxO) and the boron suboxide (BxO) articles and composition used |
| CN101277911B (en) * | 2005-09-07 | 2012-06-27 | 六号元素（产品）（控股）公司 | Boron suboxide composite material |
| EP2248787A1 (en) | 2005-09-07 | 2010-11-10 | Element Six (Production) (Pty) Ltd. | Boron suboxide composite material |
| US7955579B2 (en) | 2005-09-07 | 2011-06-07 | Element Six (Production) (Pty) Ltd. | Boron suboxide composite material |
| US20110203187A1 (en) * | 2005-09-07 | 2011-08-25 | Geoffrey John Davies | Boron Suboxide Composite Material |
| US8197780B2 (en) | 2005-09-07 | 2012-06-12 | Element Six (Production) (Pty) Ltd. | Method of producing a boron suboxide material |
| CN102173822B (en) * | 2005-09-07 | 2013-01-09 | 六号元素（产品）（控股）公司 | Boron suboxide composite material |
| US20100304138A1 (en) * | 2007-04-26 | 2010-12-02 | Anthony Andrews | Boron suboxide composite material |
| WO2008132676A3 (en) * | 2007-04-26 | 2009-06-04 | Element Six Production Pty Ltd | Boron suboxide composite materials |
| CN101668716B (en) * | 2007-04-26 | 2013-04-03 | 六号元素（产品）（控股）公司 | Boron suboxide composite material |
| US9908782B2 (en) | 2013-02-14 | 2018-03-06 | The United States Of America As Represented By The Secretary Of The Army | Method for synthesis of boron suboxide |
| US11066331B2 (en) | 2018-04-27 | 2021-07-20 | Saint-Gobain Ceramics & Plastics, Inc. | Material including boron suboxide and method of forming same |
| US11827567B2 (en) | 2018-04-27 | 2023-11-28 | Saint-Gobain Ceramics & Plastics, Inc. | Material including boron suboxide and method of forming same |
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